[PATCH v3 04/15] tests/nopulate: Add a FDT_NOP before the root node

[Herve Codina <herve.codina@bootlin.com>]

A FDT_NOP tag can be present at the offset 0 and so before the root
node. This is a legit case.

The nopulate tool adds FDT_NOP tag after each tag encountered but it
doesn't add a FDT_NOP tag at offset 0.

Improve nopulate to fix this lack and add a FDT_NOP tag at offset 0.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 tests/nopulate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/nopulate.c b/tests/nopulate.c
index 06f8369a..050e69fb 100644
--- a/tests/nopulate.c
+++ b/tests/nopulate.c
@@ -22,7 +22,10 @@ static int nopulate_struct(char *buf, const char *fdt)
 	uint32_t tag;
 	char *p;
 
+	/* Add a FDT_NOP before the root node (first node) */
 	p = buf;
+	*((fdt32_t *)p) = cpu_to_fdt32(FDT_NOP);
+	p += FDT_TAGSIZE;
 
 	do {
 		offset = nextoffset;
-- 
2.55.0